JPH04501743A - Reheating, holding and storage furnaces for steel products - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Reheating, holding and storage furnaces for steel products In steel mills with continuous cycle operations, starting with liquid metal in a ladle, The product leaving the ladle is immediately sent to the reheating and soaking oven without any damage. Traditionally, the manufacturing process is to send final and semi-finished steel products to a rolling mill. It was used.

To carry out this process, a holding furnace is installed between the continuous casting equipment and the rolling mill. It is necessary to introduce another secondary furnace, which is known in the art, when the rolling mill is temporarily stopped. Or simply to absorb the time difference due to the production speed of casting and rolling, It provides the ability to store items for as long as needed.

As a result, when the rolling mill temporarily stops (due to a malfunction or a change in the dimensions of the product row, etc.) It is also possible to store semi-finished products after casting in a holding furnace without interrupting casting. Wear. Similarly, by sending pre-stored semi-finished products to a rolling mill, casting It becomes possible to absorb even temporary interruptions.

However, in the known technical solution using two furnaces mentioned above, one is reheating and soaking Furnaces, one generally arranged in parallel, are required for the storage and discharge of product between the two furnaces of the holding furnace. A mixing process for cast products is necessary for sequential operation. means.

There, once the product finishes casting, it no longer reaches the rolling mill in the same sequence. small batches of products with special properties that clearly make mixing with others undesirable. In production, such mixing steps may not be allowed.

The purpose of the present invention is to solve the above-mentioned disadvantages by providing a holding function and a reheating and soaking function. Execute functions together.

By providing a furnace that can maintain production continuity as soon as the product finishes casting. Ru.

For this purpose, it is considered to build furnaces for reheating, holding and storing steel products. Ta. The furnace consists of a roller conveyor for carrying the product into the furnace and a roller conveyor for carrying the product out of the furnace. A conveyor with a vertical member placed so as to communicate with the roller conveyor in the horizontal direction. The product is moved along a conveying path, and the conveying path is a vertical support member for the product. vertical transfer members, which are placed alternately with support members, and which An upward movement and a horizontal movement to advance the product are performed in conjunction with the placed between the rollers of a roller conveyor for removal from or loading onto In reheating, holding and storage furnaces for steel products with exposed ends of these members The mold support members are divided into at least two groups, which are arranged in sequence, each of which each group can be raised independently, and the two groups, the vertical support member and the vertical transfer member, are The upper surface of the member is higher than the roller conveyor in its maximum raised position and the vertical between the minimum lift position where the top surface of the conveyor is lower relative to the roller conveyor. It can move vertically with respect to the roller conveyor.

In order to clarify the innovative principle of the invention and its advantages over the prior art, the accompanying drawings are incorporated herein by reference. One possible embodiment in which these principles may be applied is described below with reference.

Figure 1 shows the holding that realizes the claimed innovative principle.

Figure 2 is a side view of the reheating and soaking furnace, and Figure 2 is a schematic cross-sectional view taken along the line ■-■ in Figure 1. 3 is a schematic diagram of the movement sequence operation of products in the furnace in FIG. 1 shows a schematic diagram of the storage sequence operation of the in-furnace product in FIG. 1;

As shown in FIG. 1, a reheating and soaking furnace 10 according to the present invention A roller conveyor 11 for carrying into the furnace and a roller conveyor for carrying out from the furnace. It consists of a conveyor 12 and a plurality of vertical transfer members 13, and the vertical transfer members are A cable extending between the roller conveyors and arranged in two consecutive assemblies 14 and 15 Variable level vertical support members are alternately placed (see Figure 2).

The vertical transfer member 13 belongs to the prior art, but is constructed by mechanical means not shown here. , the maximum lifting position where the top surface is higher relative to the roller conveyor, and the lower vertically between a certain minimum elevation position and the left end of the vertical member (as shown in Figure 1). horizontally between the point close to the left wall of the furnace (so that the right edge is close to the right wall of the furnace) can move together.

On the other hand, the variable bell vertical support members 14 and 15 (although this belongs to the known art) (by mechanical means not shown), the upper surface is raised higher relative to the roller conveyor. between a maximum lift position and a minimum lift position that is lower relative to the roller conveyor. can only be moved vertically and independently of each other.

A variable level vertical support member 14 is located in an area of the furnace known as the reheat area. However, variable level vertical support members 15 are located within the area of the furnace known as the storage area. These are located at the end of the vertical member so that they can be inserted between the rollers of a roller conveyor. The section gradually tapers in the horizontal direction.

Of course, the furnace includes the necessary equipment for its functioning, e.g. burners, heat and smoke evacuation devices. , which are not described here as they belong to the public art, but are recommended to experts in this field. can be easily considered. Moreover, as its special application shows, All exposed interior surfaces of the furnace are covered with a suitable refractory material.

Due to the above-mentioned embodied furnace dynamics, there is no need to use other furnaces; All storage, release and continuous operations are carried out internally.

The flexibility of the systems adopted allows for operational sequences to carry out their functions. It is clear that the instances may be different.

A pure understanding of the capabilities and advantages of furnaces to which the claimed principles are applied is provided by examples. However, regarding the operational sequence that allows continuous casting and movement of the products brought in, It is explained below.

In the following description, the expression "basic cycle of the vertical transfer member 13" , by means of a combined vertical and horizontal movement of the vertical transfer member 13, on them. In the sense of advancing the product, it is understood as a movement well known to experts in this field. It is. More specifically, this basic movement protects any product placed on it. 5. Lifting of the vertical member 13 to raise, and transfer to horizontally move the product. It consists of a lowering to finally place the product again. Then the vertical member returns to the initial position in an empty state and prepares to perform the next basic movement.

For the purposes of the various cycles described below, the reference level -/10 is the It is used on the upper tangent line of the roller conveyor for entering and exiting the furnace. The attainment levels of various vertical members are designed.

We will first discuss possible continuous operation cycles, in which we will discuss the roller control after continuous casting. The products carried into the furnace by the conveyor 11 are not stored, but are moved through the furnace and manufactured. Retained in the reheating area for only the time necessary to perform the reheating and soaking required for the process. .

As shown in Figure 3(a), this operating condition (transportation conditions that can be understood from the following description) method), the products reaching the roller conveyor 11 are placed on level-3. Products at the opposite end of the vertical member 15, level-1, and therefore the roller conveyor Two products on the vertical member 14 below the upper product transfer level are observed.

The rolling speed and the speed at which it is carried out of the furnace are the same as the casting speed and the speed at which it is carried into the furnace. Since the speed is clearly faster than the speed, the new product that has reached the roller conveyor 11 is in the furnace. When fully loaded, the roller conveyor 12 is reliably empty.

As shown in Figure 3(b), after the product is completely loaded into the furnace, the next forward movement begins. During the movement, the vertical members 14 and 15 rises to + level, and vertical member 13 rises to +/-〇 level.

Through a series of basic movements of the vertical member 13, the position shown in FIG. 3(c) is reached. The product moves through the furnace.

Next, vertical member 13 goes to level -4, and vertical member 14 goes to level -1. By lowering the product, the first product is transported out of the furnace on a roller conveyor and sent to the rolling mill. It can be placed on the line to be sent to.

At the same time, as shown in FIG. 3(d), the vertical member 15 moves to level -4 and continues New products are carried in from the casting through a roller conveyor 11. Therefore Rolako The next product on conveyor 11 is a series of products between levels -1 and -4 of vertical member 13. Successive elementary movements cause the vertical member 15 to be moved to the opposite end. This operation is carried out at the time intervals necessary for the introduction of new product into the furnace. In this way, Figure 3 ( e), and start a new sequence as described above, as in Figure 1. You can

In the event of an unexpected stoppage of the rolling mill, the products that arrive after being continuously cast can be stored as described above. When rolling restarts, it is possible to maintain the appropriate temperature during continuous conveyance outside the furnace. ensure that it is maintained. When the furnace is in the state shown in Figure 3(d), the functionality of the rolling mill is Figure 4 shows an example of the movement within the furnace to achieve product storage, assuming that an interruption occurs. Shown below.

The vertical member 14 rises and its level remains at +3 during the entire storage period. in addition Therefore, the products above them are transferred to the next movement of the vertical member 13 and the roller conveyor. Vertical member 15 and vertical member 13, which are not caught up in all the new products that arrive, are and move the product onto it in the same way as already mentioned in the case of continuous functions, but , the products arriving at the roller conveyor are transferred to the opposite end of the vertical member 15. and only at regular intervals slightly larger than the width of the individual products. It is only necessary to gradually pass through the positions shown in figures (a), (b), (c) and (d). There is one difference.

The maximum capacity of the furnace in the position of Figure 4(d) is determined in each case by restarting rolling. Storage of many products must guarantee the possibility of product storage until To guarantee storage, it is at least equal to the maximum capacity of the libé.

From this point of view, the sequence for transporting out of the furnace, which is carried out when rolling is restarted, is It is easy to intuitively know the The first product in the line is a roller controller. The vertical member 13 and the vertical member 1 are placed on the conveyor 12 and transported out of the furnace. 4, then raise vertical members 14 and 15 to the same level +1, Bring the next product directly above the roller conveyor 12 and place the product on the roller conveyor. Leave the furnace until it is completely empty, then lower the vertical members 13 and 14 again to fill the inside of the furnace. It takes as many vertical members as it takes to move all the products in one position. It is sufficient to carry out the basic movements of bar 13.

All of the above procedures are, of course, by way of example only and in accordance with the innovative principles of the present invention. Great flexibility is afforded to the possible movements inside the embodied furnace. other special features For the purpose of meeting special requirements, e.g. to change the thermal operating conditions carried out, It is also easily conceivable to vary the residence time of the product in different areas of the tube. Similarly, fig. The furnace structure shown is schematic and is to be considered within the scope of the claimed invention. It's not something that should be done. For example, a roller conveyor may be located outside the furnace or a vertical It is also possible for the member to extend outside the furnace to reach the conveyor.

In addition, vertical members and roller conveyors that raise the product from the roller conveyor itself The reciprocal motion between the opposite vertical motion of the same roller conveyor, and can easily be considered As such, the vertical support due to the obvious fluctuations required in the sequence and run-out of the vertical member. Of course, this can also be achieved by vertical movement of the holding member.

international search report international search report FR8900604 S^　32B36

Claims (4)

[Claims] 1. Roller conveyor for transporting products into the furnace and rollers for transporting products out of the furnace along a transfer path with vertical members arranged to connect the conveyor laterally. The product moves, and the transfer path includes a vertical support member and a vertical transfer member for the product. The transport members are placed alternately with and associated with supporting members. The product is removed from these by making an upward movement and a horizontal movement to advance the product. This placed between the rollers of a roller conveyor to take out or load onto these Vertical support members are used in reheating, holding, and storage furnaces for steel products with The bars (14, 15) are divided into at least two groups, which are arranged in order, and can be raised independently, and each of the vertical support members (14, 15) and the vertical transfer member ( In the two groups 13), the top surface of the vertical member is higher than the roller conveyor. With a certain maximum lift position, the top surface of the vertical member is lower relative to the roller conveyor. movement vertically with respect to the roller conveyor (11, 12) between a certain minimum lift position; Reheating, holding and storage furnace for steel products, characterized by obtaining. 2. comprising means for vertical movement of a vertical member, the means being adapted to a vertical support member at a defined position; This predetermined position consists of the position between the small amount and the maximum raised position, and the water during the planar motion cycle, at the level determined by the vertical support members (14, 15). reaching or leaving the vertical transfer member (13) and the vertical support (13) member Products on top can be linked together to be transferred in one step. The furnace according to claim 1, characterized in that: 3. between the roller conveyor (11, 12) and the vertical support member (14, 15). Claim characterized in that the mutual movement is effected by means of vertical movement of the vertical support members. The furnace according to claim 1. 4. between the roller conveyor (11, 12) and the vertical support member (14, 15). Claim characterized in that the mutual movement is effected by vertical movement means of the roller conveyor. The furnace according to claim 1.